# Set up GOBIN so that our binaries are installed to ./bin instead of $GOPATH/bin.
PROJECT_ROOT = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
export GOBIN = $(PROJECT_ROOT)/bin

GOLANGCI_LINT_VERSION := $(shell $(GOBIN)/golangci-lint version --short 2>/dev/null)
REQUIRED_GOLANGCI_LINT_VERSION := $(shell cat .golangci.version)

# Directories containing independent Go modules.
MODULE_DIRS = . ./tools

.PHONY: all
all: build lint test integration-test

.PHONY: clean
clean:
	@rm -rf $(GOBIN)

.PHONY: build
build:
	go install go.uber.org/nilaway/cmd/nilaway

.PHONY: test
test:
	@$(foreach mod,$(MODULE_DIRS),(cd $(mod) && go test -race ./...) &&) true

.PHONY: cover
cover:
	@$(foreach mod,$(MODULE_DIRS), ( \
		cd $(mod) && \
		go test -race -coverprofile=cover.out -coverpkg=./... ./... \
		&& go tool cover -html=cover.out -o cover.html) &&) true

.PHONY: upgrade-deps
upgrade-deps: MODULE_DIRS := $(MODULE_DIRS) ./testdata/integration
upgrade-deps:
	@echo "[upgrade-deps] Upgrading dependencies and tools"
	@echo "[upgrade-deps] Checking for latest golangci-lint version"
	@CURRENT_VERSION=$$(cat .golangci.version); \
	LATEST_VERSION=$$(curl -s https://api.github.com/repos/golangci/golangci-lint/releases/latest | grep '"tag_name"' | sed 's/.*"v\([^"]*\)".*/\1/'); \
	echo "[upgrade-deps] Current golangci-lint version: $$CURRENT_VERSION"; \
	echo "[upgrade-deps] Latest golangci-lint version: $$LATEST_VERSION"; \
	if [ "$$CURRENT_VERSION" != "$$LATEST_VERSION" ]; then \
		echo "[upgrade-deps] Updating .golangci.version from $$CURRENT_VERSION to $$LATEST_VERSION"; \
		printf "$$LATEST_VERSION" > .golangci.version; \
	else \
		echo "[upgrade-deps] golangci-lint already up to date"; \
	fi
	@echo "[upgrade-deps] Upgrading dependencies in all modules: $(MODULE_DIRS)"
	@$(foreach mod,$(MODULE_DIRS), \
		(cd $(mod) && \
		$(if $(GO_VERSION),echo "[upgrade-deps] go mod edit -go=$(GO_VERSION): $(mod)" && go mod edit -go=$(GO_VERSION) &&) \
		echo "[upgrade-deps] go get -u ./...: $(mod)" && \
		go get -u ./... && \
		echo "[upgrade-deps] go mod tidy: $(mod)" && \
		go mod tidy) &&) true

.PHONY: golden-test
golden-test:
	@cd tools && go install go.uber.org/nilaway/tools/cmd/golden-test
	@$(GOBIN)/golden-test $(ARGS)

.PHONY: integration-test
integration-test:
	@cd tools && go install go.uber.org/nilaway/tools/cmd/integration-test
	@$(GOBIN)/integration-test

.PHONY: lint
lint: format-lint tidy-lint golangci-lint nilaway-lint
	@echo "Run \`make lint-fix\` to automatically apply fixes (if available)"

.PHONY: lint-fix
lint-fix: export FIX=true
lint-fix: format-lint tidy-lint golangci-lint nilaway-lint

# Install golangci-lint with the required version in GOBIN if it is not already installed.
.PHONY: install-golangci-lint
install-golangci-lint:
    ifneq ($(GOLANGCI_LINT_VERSION),$(REQUIRED_GOLANGCI_LINT_VERSION))
		@echo "[lint] installing golangci-lint v$(REQUIRED_GOLANGCI_LINT_VERSION) since current version is \"$(GOLANGCI_LINT_VERSION)\""
		@curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOBIN) v$(REQUIRED_GOLANGCI_LINT_VERSION)
    endif
	@echo "[lint] $(shell $(GOBIN)/golangci-lint version)"

.PHONY: format-lint
format-lint: install-golangci-lint
	@$(foreach mod,$(MODULE_DIRS), \
    	(cd $(mod) && \
    	echo "[lint] golangci-lint fmt: $(mod)" && \
    	$(GOBIN)/golangci-lint fmt $(if $(FIX),,--diff)) &&) true

.PHONY: golangci-lint
golangci-lint: install-golangci-lint
	@$(foreach mod,$(MODULE_DIRS), \
		(cd $(mod) && \
		echo "[lint] golangci-lint: $(mod)" && \
		$(GOBIN)/golangci-lint run $(if $(FIX),--fix) --path-prefix $(mod)) &&) true

.PHONY: tidy-lint
tidy-lint:
	@$(foreach mod,$(MODULE_DIRS), \
		(cd $(mod) && \
		echo "[lint] mod tidy: $(mod)" && \
		go mod tidy $(if $(FIX),,-diff)) &&) true

.PHONY: nilaway-lint
nilaway-lint: build
	@$(foreach mod,$(MODULE_DIRS), \
		(cd $(mod) && \
		echo "[lint] nilaway linting itself: $(mod)" && \
		$(GOBIN)/nilaway -include-pkgs="go.uber.org/nilaway" ./...) &&) true
